Saw-filing machine



Patented Apr. 21, 1925.

UNITED STATES JOHN F. W. DIEGEL, OF MANITOWOC, WISCONSIN.

SAW-FILING MACHINE.

Application filed June 15. 1923. Serial No. 645,696. Renewed February18, 1925.

To all whomz't may conce/nf Be it known that l. Join'l". lV. Ducoin.. acitizen of the Unit-ed States. and-resident of Manitowoc. in the countyof Manitowoc and State of iiseonsiin hate invented certain new anduseful Improvements in Flaw- Filing Machines; and l do hereby d'w-larethat the following is a full. clear, and exact description thereof. l

My invention relates to improve. 'lents in saw filing machines, and isparticu', irly directed to a class similar to that iisclosed in mypatent of May 24, 19231, Number 1,379,252.

The object of my invention is to provide a machine for automaticallysharpening the teeth of a saw.

Another object of my invention is to provide a saw filing machine, thefilingelement of which is moved back and l'orth. with re spect to thesawfin a manner similar to the motion imparted to a file when the workis done by hand.

A still further object of my invention is I' to provide means for movingthe file with respect to the saw, and giving the same a re-v ciprocatorymovement together with an up and down movement.

Another object of my invention is to provide means for adjusting themovement of a file with respect to the saw tooth operated upon, therebypermitting saw teeth of va rions lengths to be sharpened.

Other objects' ot my invention will' be apparent from a study of thehereinafter description, together with the drawings, and it will benoted that I have provided a. new and improved machine for tiling saws,of simple construction, strongr and durable and one which is adapted fortiling' saws of ditttcrent kinds as .hand saw, band saws, circular sawsand the like.

In the accompanying drawings, in which my invention is fullyillustratcd:-

Figure 1 is a vertical sectional v1cw taken Qn the line 1-1 of Fig. 2:

Fi 2 is a top plane view of Fig. 1, showing tiereinf the main operatingelements of my machine; and

Fig. 3 is a detail View of the guide for a lever which movesthe file upand down.

The various operating parts of my ma.-

Vchine are, mounted upon a suitable frame,

together with the means for .holding the saw while being operated upon.As regards ille detailed strupture or material, the com struction of theframe of the machine is immaterial, it beingr possible for a merhanic todevise a frame suitable for the purpose.

Referring tothe drawings in detail, I have shown a supporting framehaving a base l, the same being mounted upon suitable supporting legs 2and upon the base 1 is mounted the operating means of my improvedmachine together with the means lor holding the saw while being actedupon, the. latter being briefly designated by the numeral 3, the detailstructure of which is immaterial so long as it supports a saw in such away that it will be acted upon by the file' hereinafter to be described.It is of course to be understood that in machines of this character thesaw moving means is eon structed in such a manner that the same will bemoved step by step and a distance equal to the distance between adjacentteeth of the saw at each operative stroke of the file.

The base 1 has secured thereto a pair ot vertically disposed uprights,one of which l have shown in the accompanying drawing and designated bythe numeral 4. The upper end of the uprights has rotatably mount` edtherein a shaft 5, the same being driven by any suitable means; forinstance, a pulley wheel 6 keyed to one end of the shaft 5 and aroundwhich a belt from any drivingY means is adapted to be passed.

The shaft 5 has pivotally mounted thereon a pair of arms 7 and 8, theouter ends ol which are connected to a bed platey l) which may be madeintegral therewith il so desired. The adjacent edges of ear-,h of the,arms 7 and 8 is provided with a dovetailed groove 10 in which a slideplate 11 is adapted to reciprocate. One end ot the plate 1l has securedthereto a biiurcated hinge member 12 to which is pivoted a connecting'rod 13 the free end of which is rigidly eonnected to an eccentric strap14 fitted about the periphery of an eccentric 15 keyed to the shaft 6.

Thus it will be observed that upon rolation of the shaft 5 the eccentric15 will cause the slide plate 11 to reciprocate between the arms 7 and 8for a purposeI hereinafter to be fully described.

Referring to Figs. 1 and 3 it will he seen that I have secured to oneface of the vertical upright 4 a dovetailed guideway 16, the same havingan entrance 17, in which is mounted for up and down movement a plate 18the central portion of which has secured lll() thereto a stub shaft 19.The shaft 19 has placed thereon a bearing sleeve 20 upon which isrotatably mounted a roller A.

The shaft 19 `has pivoted thereon, and upon the bearing sleeve 20, thearms 21 and 22 carried by the end of a lever 23, the intermediateportion of which is supported within the bifurcated end 24 of a verticalstandard 25 which is mo' ible within a slot 2G formed in the base 1 anddisposed under the intermediate portion of the lever 23. By reference toFigure 1 it will be seen that the standard 25 has formed integralthere.- with and adjacent a threaded end portion 27, a collar 28 whichsupports the standard upon the base, and by means of the threaded endportion 27, having thereon a clamping nut 29 the standard may bepositioned any place within the limits of the slot 26, therebyincreasing or decreasing the movement of the free end of the lever 23,for a purpose hereinafter described.

The shaft 5 has further secured thereto a disc 30 one face of which hasmade integral therewith, and extending around approximately one half ofits circumference, a cam 31 which .is engageable with an enlargedportion 82 of the roller A, while a portion of the periphery of the disc30 is adapted to engage a reduced portion 33 of the roller. Thus it willbe apparentI that as the disc 30 rotates the roller A, in contacttherewith, will be moved up and down within the guide-way 16, formedppon the upright 4, thus imparting an up and down movement to the freeend of the lever 23, connected to the roller shaft and fulcrumed uponthe standard 25.

The free end of the lever 25 has threaded therein a lhand screw 35 uponthe end of which rests the bed plate 9connecting the arms 7 and 8,previously referred to.

The outer end of the slide plate 11 has secured thereto a U-sha ed frame36, one leg of which is provide with a socket 37 while the other leg hasa removable socket 38 for the reception therebetween of a tile 39. Itwill be of course undegstood, by reference to Fig. 1, that the sockets37 and 38 are adjustable within the frame, thereby accommodating filesof various lengths.

In the operation of my improved machine, the saw to be sharpened issupported by the saw supporting means 3 and moved step by step by anysuitable meansdesired. The l'ile is positioned upon the saw and by meansof the adjusting screw 35 the limit of the downward movement of the fileupon the saw may be controlled. It is preferably desired that this limitbe so adjusted that the file will bear upon the base of the tooth.Having thus adjusted the various parts of Y the machine motion isimparted to the shaft 5 and as the same rotates the eccentric 15 will4cause the flle'to be reciprocated upon4 the saw., and at the end of itsreciprocation the cam 31 will engage the enlarged portion 32 of theroller A, thereby forcing the same down within the guideway 16 andraising the free end of the lever Q3, which in turn raises the arms 7and 8, together with the file 39. yThis movement removes the file fromin contact with the saw tooth and the same is held in this position, bythe cam 31 until the eccentric has made one-half of its revolution,during which time the file is returned `to its initial position, thatis, the beginning,l of its operative stroke. On the completion of thismovement, the cam 31 disengages the roller A and permitsthe same to moveupwardly until the reduced portion 38 of the roller engages its portionof the disc 30, until the file rest-s upon the saw, th us permitting thefile carrying frame to move downwardly so that the file may operativelyengage a tooth of the saw and be moved with respect thereto in a mannerpreviously described.

From the above description it will be apparent that by means of theadjusting screw 35, and the movement Aof the standard 25, upon which thelever 23 is fulcrulnd, the up and down movement of the l"file may beadjusted to a nicety, thus permittiiig@ the sharpening of teeth ofvarious lengths.

The eccentric and the cam elements carried by the. shaft are so timedwith respect to each other that the up and down move ment of the tile isnot started until near the completion of its back and forth movement,thereby preventing the. file .from coming down upon the saw during itshorizontal movement and sharpening the tooth in an inferior manner.

During the ling stroke of the machine, it is obvious that` the file 39may sustain the weight ofV the arms 7 and 8and all parts carriedthereby. The weight of these parts upon the file will ordinarily exertsutlicient pressure to cause it Ato cut ell'ectivl but in no case willthis pressure cause the le to cut beyond a distance equivalent to thedistance controlled by the enlarged aud reduced portions of the rollerA. y From the foregoing, it is thought that the construction, ope-rationand many advantages of the herein described invention will be apparentto those skilled in the art, without further description` and it will beunderstood that various changes in the size, shape, proportion, andminor details of construction may be resorted to without departing fromthe spirit or sacrificing any of the,

advantages of the invention. p

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is:-

1. A saw filing machine having a rotary driving shaft and operatingelements carried thereby, a table journaled to said shaft,

a le holder slidable upon said table and moved back and forth by one ofsaid operating elements, a rStandard carried by the base ofV the machineand supporting therein a lever, one end of which supports Said table,and the. other end of said lever engageable with another of saidoperating elements l'or impart-ing an up and down movement to saidtable.

2. A Saw tiling machine having' a rotary driving Shaft and operating'ele-ments earried thereby, a table pivoted to said shaft, a file holderslidable. upon Said table and moved back and forth by one of saidoperating' elements, a standard carried by the base, of the machine andsupporting therein a. lever one end of which sup-ports said table, andthe other end ot' said level' engageable with another of said operatinprelements or imparting an up and down movement to said table upon thecompletion ofthe first said movement.

3. A saw filing machine having a rotary driving shaft and operatingelements carriedthereby, a table pivoted to said shaft, a standardmovable upon 'said machine and supporting therein a lever, means carriedby one end of said lever for supporting said table, a tile holderslidable upon said table and moved thereon by one of said operatingelements, and the other end of said lever enga'geable with another ofsaid operating elements for imparting to said table an up and downmovement.'

4. A saw tiling machine having a drive shaft, a table pivoted thereto, asupport for the end of said table, a standard movable in a horizontalplane with respect to Said machine and in which said support rests, afile holder slidable upon the table, means carried by said shaft formoving said holder back and forth upon said table, and a second meanscarried by the shaft and adapted to engage the table support for holdingthe table in different planes during each movement of the file holderthereon.

5. A saw tiling machine having arotary drivingr shaft, a table swingingupon said shaft and adapted to extend in substantially a horizontalplane, a filel holder on said table and reciprocated thereon by anelement earried by said shaft, a support, a lever adapted for rockingmovement -Within said support and supporting the `free end of saidtable,' and an element carried by said Sha-ft and engageable with theother end of said lever for moving said table upon said shaft.

In testimony that I claim the foregoing I have hereunto set my hand atManitowoc, in the county of Manitowoc and State of Wisconsin.

JOHN F. W. DIEGEL.

